The better flask

I have a warlock who is also an alchemist. He has his alchemists enhancement flask which gives him 320 intellect. He also makes Elixir of the Monk which with his alchemists mixology gives him around 990 mastery. He's affliction for heroics and raids. For raids its Flask of the Warm Sun hands down. BUT... For five man heroics between the 320 intellect flask and the 990 mastery flask, which would do him greater good given he's around 471 overall item level and sports over 21K spellpower unbuffed.

I have a warlock who is also an alchemist. He has his alchemists enhancement flask which gives him 320 intellect. He also makes Elixir of the Monk which with his alchemists mixology gives him around 990 mastery. He's affliction for heroics and raids. For raids its Flask of the Warm Sun hands down. BUT... For five man heroics between the 320 intellect flask and the 990 mastery flask, which would do him greater good given he's around 471 overall item level and sports over 21K spellpower unbuffed.

This should likely be in the warlocks thread. Personally I don't know if mastery or int is better for locks. However 320 int for 990 mastery, I'd likely think that mastery is better. For my boomkin for example mastery is useless so the int would be more beneficial but I cannot answer that for a lock. Also as the other poster said, in heroics it hardly matters. You don't even need to flask they're so simple.

I don't have a recent simcraft handy to be able to verify it, but I would imagine similar to as your gear gets better the stat weight on mastery starts to pass int with regard to gems, so I would imagine the same would apply to an elixir with 320 int vs 990 mastery (where gems are on a 2:1 ratio and this would be a 3:1 ratio). So in lower gear levels they would be about even, but at higher gear levels the mastery would pull ahead. Obviously the best choice for anything with raids or challenge modes would still be the 1000 int flask, but for stuff that is for funsies or just messing around the mastery would be the better of the two above.

for afflicion, at around 380 ilvl int:mastery is 2:1. so if it was 660 mastery to 330 INT, then at 380 ilvl the mastery would be better. therefore for affli, mastery is miles better. its closer for demo/destro

I'm confused. You're asking whether or not using a mastery flask (which is a consumable, meaning you are spending resources) is better than the default, non-consumable flask you get for not using any flask at all.

The Alchemist's Flask isn't so much a "flask" as it is a baseline for using no flask at all (to make up for others getting their +320 int with or without flask). So using anything should be better than Alchemist's.